Shovel head



May 12, 1931. W. c. ANTHONY ET AL SHOVEL HEAD Filed Nov. 6, 1926 3 Sheets-Sheet l J 6., WW6 W 0 2 z r M zibde O 7 m @flm k n. JAWJK I m ,amww UL gez M May 12, 11931.

W. c. ANTHONY ET AL SHOVEL HEAD 1926 3 Sheets-Sheet 2 Filed Nov. 6

y 12, 3931, w. c. ANTHONY ET AL, 1,805,028

SHOVEL HEAD Filed Nov. 6, 1926 I5 Sheets-Sheet 5 Patented May 12, 1931 WILLIAM C. ANTHONY,

ILLINOIS, ASSIGNOBS TO TION OI ILLINOIS CHARLES H. BENEDICT,

ANTHONY comm,

AND LESTER WACHTER, O1? STEEL-TOR,

OF STBLEATOR, ILLINOIS, A CORPORA- snovnr. HEAD Application filed November 6, 1926. Serial No. 146,604.

-This invention relates to an elevating shovel mechanism and particularly to a head assembly for such shovel. It has for one object to provide means for stopping and 5 cushioning the movement of the bucket as it approaches its upper limit. Another object is to provide positive and simple means for initiating the return movement of the bucket. Another object is to provide means for automatically stopping the bucket as it to one end of the member A".

approaches its upper limit. Another object is to provide automatic means whereby the mechanism is prevented from operation 1f loaded to excess. Other objects will appear from time to time throughout the specification and claims.

Our invention is illustrated more or less diagrammatically in the accompanying drawings, wherein:

Figure 1 is a side elevation with parts removed and parts in section;

Fi re 2 is a detailed plan showing a portion of the operating mechanism;

Figure 3- is a side elevation on an enlarged scale showing the operating head;

Figure 4 is a plan view of Figure 3 with parts in section.

Like parts are indicated by like characters throughout.

The device is mounted on a tractor A upon which is positioned a composite built-up frame A. A is a frame A A is a power take off whereby power is taken from the tractor. A is a driving mechanism adapted to drive a winch A about which a cable E may be wound. This cable operates on a dolly A which carlies a bucket A A is a controlling lever adapted to control the driving mechanism. It is pivoted at A A is a controlling shaft having mounted on it a lever A and a connecting rod A is attached to it at one end. This rod is attached at its other end The frame and track mechanism and the driving gear may be of many different types. Their particular details form no part of the present invention and are not illustrated in the specification. It is sufiicient for the purpose 0 the present invention that a structure emtrack carried by the bodying a track along which a-bucket is to be moved and driving means for the bucket be provided. In this case the driving means is the power take-01f from the engine of the tractor.

B B are side frame members attached one each to the sides of the frames A. Attached to these members bers B B Extending downwardly from the uppermost member B are ears B B Pivotally mounted between these ears is a member B provided with a pair of perforations intermediate its ends. It is pivotally supported in the ears B by means of bolts B4 Within each of the perforations in the member B is a bolt C. Surrounding each ofsuch bolts and extending substantially from end to end of it is a sleeve 0 tubular housing C surrounds the bolt and the sleeve, at one end it is provided with an inwardly extending which normally contacts the sleeve C The parts are held against longitudinal dis placement by the member C of the bolt C.

Lying within the tubular member C and B and extending laterally across between them are cross brace mem-.

flange or shoulder C hearing at one end against the flange C v and at the other against the member B are helical springs C C is a nut on the bolt C by means of which it may be tightened to increase the compression of the spring. This nut also of course serves to hold the parts against longitudinal separation. Each of the tubular members C is provided on its under surface with a hook and one of them is provided on its upper surface with a contact member C As here shown such a contact member is provided only on the top of one of the tubular members. It might, however, be provided on both of them. C C? are pairs of reinforcing plates extending downwardly from the lowermost member B Each pair is joined adjacent its lower end by means of a bolt C. These bolts serve to limit the downward movement of the spring and bolt assembly above described.

D D are short upright members fastened to the rearmost member B D is a sheave housing or enclosing member fastened to the forward member B 1) D are rods or bolts fastened each at one .end. to the member D and at the other to one of the members D. At their forward ends the rods D are held in place by nuts D D. At their rearward ends they are held in place by pairs of nuts D D. Additionally mounted upon them are pairs of locking nuts D D. D is a compression plate slidably mounted on-the rods D and held in place by the nuts D. D is a. tubular member lying between the shafts D and fixed at one end to the generally vertical plate D" of the member D D is a second tubular member provided with perforated ears D throu h which the rods D? pass. This member T) is thus slidably mounted on the shafts D. It is of larger diameter than the tubular member D and may be axiall moved with relation to it. D is a helica sprin members D D D are helical s rings mounted one each about each 0 the shafts .D and each of them bears at one end against the plate D and at the other on one of the ears B. These springs tend normally to hold the tubular member D in the Figure 4. 12 is a contact memberv mounted preferabl on the bottom of the tubular member l and it is adapted to be contacted b the contact member C as shown in dotte lines in Figure l and on a larger scale in Figure 3. D is an attaching member mounted on the upper part of the tubular member D and D is a connecting rod fastened at one end to it and at the other end to the member A.

D is a cable end member to which the end of the cable E is removably attached. The cable E passes through a perforation in the plate D, through the center of the helical spring D through a perforation in the member D and about the sheave E which is carried on a shaft E mounted in the member D E E are sheaves mounted upon the shaft E which is carried between the brace members E E about a generally horizontal axis. The cable E having passed about the sheave E passes about the sheave E thence downward about the sheave E vwhich is mounted on the shaft E in the dolly A", thence upward about the sheave E, and thence backward where it is wound upon the winch A.

Although we have shown an operative device, still it will'be obvious that many changes might be made in size, shape and arrangement of parts without departing ma-' terially from the spirit of our invention;

and we wish, therefore, that our showing be taken as in a sense diagrammaticl The use and operation of our invention are as follows:

mounted within the tubular osition shown in full lines in The driving mechanism includes a winch and track mechanism. When it is desired to raise the shovel, the clutch is operated so that the winch is caused to rotate and the cable is drawn in. I When it is desired to stop the raisin motion the controls are operated so as-to isengage the clutch. The controlling parts of the mechanism may be operated either to disengage the brake or to disengage the clutch and permit the bucket to return to position. Automatic means are provided3for throwing out the clutch automatically when the bucket has been raised to approximately its upper limit, and additional automatic means are provided for throwing out the hoisting mechanism whenever too great a weight 1s taken into the bucket. This will now be described.

When the parts are originally assembled, the sprlng D is given an initial compression for example, a compression of one thousand pounds. If a weight less than this be carried in the bucket, it will not further compress the s ring. If a weight greater thanthis be ta on into the bucket and the hoisting mechanism be put into operation, the spring will be further compressed and Wlll operate an automatic throw out which will be described belo The automatic throw out mechanism 0 erates as follows: When an excessive weig t is taken into the bucket, and an attempt 1s made to raise it, the spring D as above mentioned will be compressed. This causes the cylindrical member D which surrounds it to be moved forward in opposition to the springs D Since the rod D is fastened to the cylindrical member D it moves with this member and since its other end is fastened to the controlling mechanism this motion of the cylindrical member D operates the controlling mechanism and automatically chsengages the clutch, and so long as the excessive weight remains in the bucket no manual operation of the control will serve to permit them to raise or attempt to raise the excesslve load. The moment the hoisting mechamsm is operated to raise this load, the spring D 1s compressed and the automatic throw out becomes operative.

In the normal operation of the shovel, when a normal load is taken, the spring D will be operated to set the hoisting mechanism into operation and to raise the shovel. As the shovel rises the axle, or some other suitable part of the dolly A, comes into contact with the hooks C on the cylindrical members C These members rotate upwardly about their axes B in response to further upward movement of the shovel. At this point as the shovel moves upward it also moves forward, carrying the cylindrical members 0 with it, thus compressing the springs 0 Thus as the bucket approaches its upper llmit a constantly greater compression is put on the springs. Just before the bucket reaches its upper limit, the contact member on one of the cylindricalmembers 0 strikes the contact member D on the cylindrical member I) and moves it forward in opposition to the springs D. Since the cylindrical member D, is not fastened to the plate D, it can move forward as described, without in any way afi'ecting or bein affected by the spring D. This forwar movement of the cylindrical member D operates through the member D to operate the controlling mechanism and automatically to throw out the driving mechanism and to prevent further raisingl of the shovel. Thus the raising of the s ovel is automatically stopped in one case when it has been raised to a sufficient degree, and in the other case when it is excessively loaded.

After the shovel has been raised to approximately the position shown in dotted lines in Figure 1 and has been dumped, it is 1 allowed to return down along the track and this return movement is initiated, accelerated and made certain by the springs C which are under their greatest compression at the time that the bucket is at its greatest height, and when therefore as soon as they are free to do so, act powerfully to drive the bucket downward.

To permit hand movement of the controls without necessarily operating the automatic control mechanism, one end of the rod D is fitted into a tube D which is provided with slots D through which the ends of a pin D positioned into rod D projects. The tube D is fastened to the lever A to move with it. It is provided at its opposite end with a nut D. D is a spring positioned about the tube D hearing at one end upon the pins D and at'the other end upon the nut D". By means of this construction the handcontrol may be operated in one direction to swing the lever- A and its only efiect upon the automatic control mechanism will be to compress the spring D, but this movement will not move the rod 13%.

We claim:

1. In combination with a shovel mechanism, a track, a bucket adapted to move along said track, means for moving the bucket, means for throwing out of operation. such bucket moving means, such means including a compressible element mounted on the shovel positioned in the hoisting line and subject to the load such element adapted to operate said throw-out to stop further hoisting movement.

2. In combination with a shovel mechanism, a track, a bucket adapted 'to move along said track, means for moving the bucket, automatic meansfor throwing out of operation such bucket moving means, and means for cushioning the final movement of the bucket and for initiating its return,

uding a compresslb e shovel positioned in d subject to the load dapted to operate said thrower hoisting movement.

on with a shovel. mechthrow out means incl element mounted on the hoisting 1 such element a out to stop furth 3. In combinati anism, a track, a

g said track, means bucket, automatic of operation such such means including ments, pivotally mounte elements. carrying engag to engage a part of along the trac presses them, operate said ing movemen ing positioned in ject to the load hoiste 4. In combination nism, a track, a, along said track, in bucket, automa of operation s pivotally mount elements carrying e to engage a part of bucket adapted to move for moving the for throwing out bucket moving means,

compress1ble eled on the shovel such ing parts adapted bucket as it moves hereby the bucket co such elements, adapted row-out to stop further hoistt said throw out mechanism bethe hoisting line and subwith a shovel mechabucket adapted to move cans for moving the tic means for throwing out uclf bucket movin ed on the shovel including ngaging parts adapted such bucket as it moves hereby the bucket comelements adapted as they nt of the bucket to 0 stop further presses them, such due to the moveme esaid throw-out t hoisting movement bers adapte to initiate bucket said throw out an additional compres eldingly to resist the 5. In combination wi aratus" having a recept ng such receptacle, t mechanism t of such moving means means each adapted to out mechanism one in ve load put upon (1 the other such com ressible memd when they are ree to expand the return movement of mechanism includin sible element adapt throw-out movement.

th a material hanchanical throw-ou to prevent movemen and two operating operate such throwresponse to any excessi such moving mechanism an ct in response to movemen e the final throw out operating in each case the same. ination with a material hans having a receptacle and uch receptacle, an automechanism of such movadapted to a such receptacl member bein dling apparatu means for moving 5 matic mechanical throw-out event movement (1 two mechanical operating (1 to operate such throwanism one in response to any exon such moving mechaned to act in response receptacle the final mber being in each adapted to pr means each adapte 'cessive load put up ism and the other adapt to movement. of such throw out operating me case the same.

7 In combination with a material handling apparatus having a receptacle and means for moving such receptacle, a throwout mechanism adapted to prevent movement of such moving means and two me- 5 chanical operating means each adapted to operate such throw-out mechanism one in res onse to any excessive load put u on suc moving mechanism by being ta en into such receptacle and the other adapted to act in response to movement of such receptacle the final throw out operating member being in each case the same.

8. In combination with a material handling apparatus having a receptacle and v means for moving such receptacle, a single automatic throw-out mechanism adapted to prevent movement of such moving means and two mechanical operating means each adapted to operate such throw-out mechanism one in response to any excessive load put upon moving mechanism by being taken 1nto such receptacle and the other adapted to actin response to the movement of such receptacle beyond a predetermined point the throw out mechanism including a main movable member adapted in each case of throw outoperation to be operated similarly.

Si ned at Streator, count of La Salle and tate of Illinois, this 29t day of Octo- 30 ber, 1926.

WILLIAM C. ANTHONY. CHARLES H. BEN EDIGT. LESTER WACHTER. 

